ngx_file_at_info  517 src/core/ngx_open_file_cache.c     if (ngx_file_at_info(at_fd, name, &atfi, AT_SYMLINK_NOFOLLOW)
ngx_file_at_info  601 src/core/ngx_open_file_cache.c     if (ngx_file_at_info(fd, "", fi, AT_EMPTY_PATH) != NGX_FILE_ERROR) {